Alright, you sly son-of-a-gun, you got me. I'm going to run my first Narrative TTRPG. What do I need to know?

A while back I asked for some advice about running a haunted Beaver Dam game, and a few people popped up to ask why I wasn't trying out a narrative RPG system instead of using classic DnD.

Well, you got me. After some discussion (particularly about the painful amount of time to conduct a high level fight in 5e), we're going to try out the Dungeon World system instead. I've never run a TTRPG like this, and I'm rapidly working through the rulebook to figure it out. But rules only take you so far, there's a lot of learning that only comes with experience.

So for those of you with experience, I ask you: What do you wish you would have known before running a narrative TTRPG?